Entirely black bird with long tail that seems loosely attached. Named for its thick, grooved bill with a curved top, but grooves often difficult to see. Widespread through Central and South America, north to southern Texas. Most similar to Smooth-billed Ani, which lacks the grooved bill. Most often found in small flocks. Prefers open shrubby habitats such as weedy lots or woodland edge. Very similar to Smooth-billed Ani.